Sierra games have inspired a whole slew of would-be game developers to try their hand at their own adventure titles. Although many have been announced and are still works in progress, there are currently only two completed ones - Space Quest: The Lost Chapter and Space Quest 0: Replicated. Both run on the AGI engine, with the former running in DOS and the latter running in Windows.

Space Quest: The Lost Chapter takes place between Space Quest II and III, as Roger's escape pod crashes on the surface of another jungle planet. Although some of the sprites show improvement over Sierra's games, the puzzles are absolutely infuriating, and the writing could've used some serious polishing, as it's filled with spelling errors and grammatical issues. It's an amateur effort, and it shows.

On the other hand, Space Quest 0 shows quite a bit more professionalism. It begins much like the first Space Quest game, with Roger being the lone survivor of a brutal invasion, and escaping with his life. In his adventures, he needs to track down the mysterious blue skinned alien chick that he sees at the beginning of the game. The puzzles are much more logical than even Sierra's better games of the era, and the plot and locales, while hardly original, are still pretty decent. It still suffers from some annoying locations - once you escape, you need to swim through a series of tunnels filled with deadly coral, and coming too close will kill you, which is just as bad, if not worse, than the tentacle mess from Space Quest II. But in spite of this, it's pretty decent for a fan game and definitely worth checking out.

Roger Wilco was briefly the star of his own comic book series, published by Adventure Comics. The three issue series is vaguely based on the first game, although the events are drastically reinterpreted. The first issue is in color, but the other two are only in black and white. You can find full scans at Space Quest.net.

The Space Quest games have been collected numerous times over the years. Some of these were simply disks for all three games tossed in the same package. In 1994, Sierra issued The Space Quest Collection on CD, as part of their 15th Anniversary celebration. This included Space Quests I (EGA and VGA) to Space Quest V, in addition to a video and a history of the series. A year later, they published the Roger Wilco Unclogged collection, which has the same basic contents, but included the Take-a-Break Pinball games and had a different video. The year after that came the release of the Space Quest Collection Series, which included all six games, along with a "preview" of the ill-fated Space Quest 7. Finally, ten years later, in 2006, Vivendi released the Space Quest Collection, which includes all six games on a single DVD, except it's missing the EGA version of Space Quest I. It also includes a licensed version of DOSBox so these games can be played in Windows XP.

One of the Space Quest compilations promised an exclusive look at Space Quest VII, which was intended to be a multiplayer game. Alas, according to various financial and management issues, the game was cancelled before it got very far off the ground.

Years later, after Vivendi Universal bought Sierra, the new management decided they wanted to resurrect some of their own properties. Some of these included new games in the Kings Quest, Space Quest, and Leisure Suit Larry line. The only game that was release was Leisure Suit Larry: Magna Cum Laude. Although its bawdy humor was intact, all of the adventure game elements were removed in favor of lousy mini-games. Looking at this example, it's a good thing that the intended Space Quest game was cancelled, because it probably would've been a bastardization of the original series.

Some fans put together some efforts to make a Space Quest 7 with the help of Josh Mandel, but that seems to have fallen through the cracks.

Take-A-Break Pinball is a Windows-based pinball game developed by Dynamix. All of the tables are based off Sierra/Dynamix properties, including Kings Quest, Stellar 7, Willy Beamish and of course Space Quest. There are three Space Quest tables, all based on various locations from Space Quest IV.